820782074227 has 8 divisors (see below), whose sum is σ = 834366606480. Its totient is φ = 807308436480.

The previous prime is 820782074183. The next prime is 820782074267. The reversal of 820782074227 is 722470287028.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-820782074227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (820782074267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27708702 + ... + 27738307.

It is an arithmetic number, because the mean of its divisors is an integer number (104295825810).

Almost surely, 2^820782074227 is an apocalyptic number.

820782074227 is a deficient number, since it is larger than the sum of its proper divisors (13584532253).

820782074227 is a wasteful number, since it uses less digits than its factorization.

820782074227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55447253.

The product of its (nonzero) digits is 1404928, while the sum is 49.

The spelling of 820782074227 in words is "eight hundred twenty billion, seven hundred eighty-two million, seventy-four thousand, two hundred twenty-seven".